Rohde & Schwarz SMM100A, User Manual

Page: 108 / 1088

Configuring the internal baseband source
R&S
®
SMM100A
108 User Manual 1179.1341.02 ─ 05
Example:
The following figures demonstrate the effect of the clipping on the crest factor for typi-
cal scenarios.
Enabled is clipping with vector mode (|I+q|), using a signal configuration with 2 active
channels.
Constellation diagram of the signal without clipping,
shows the level mapping Constellation diagram with clipping level 80%, vector
mode (|I+q|) The circle emphasizes the changed
constellation points
●
Filtering is applied subsequently. The used filters are specially designed so that
they filter out the distortion.
4.4.2 Common settings
The start dialog of each digital standard follows a repeating dialog structure that com-
prises the tabs "General", "Trigger In", "Marker" and "Clock".
The "General" tab comprises the primary settings of the standard, the functions for
storing and recalling settings. It also provides access to further functions and dialogs,
like the "Filter" settings.
The "Trigger In", "Marker" and "Clock" tabs comprise the settings related to the corre-
sponding function.
In the following, we use the "Custom Digital Modulation" dialog to explain the provided
common settings. The related remote-control commands are listed in the order "Cus-
tom Digital Modulation", "ARB", "Multi Carrier CW".
This section focuses on the available settings.
For more information refer to:
●
Chapter 4.4.1.3, "Baseband trigger signals" , on page 94.
●
Chapter 4.4.1.2, "Regular marker output signals" , on page 92
●
"Clock signals" on page 90
Common functions and settings in the baseband domain